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OD 3inch SCH40 6m Stainless Steel Seamless Pipe ASTM A106 Grade B Pipe Galvanized

Categories Stainless Steel Seamless Pipe
Brand Name: HEBEIPENGXIN
Model Number: ASTM A106 Gr.B Galvanized Pipe, OD 3 Inch, SCH 40, 6 Meters, BE Ends.
Certification: ASME
Place of Origin: CHINA
MOQ: 20 Pcs
Price: Depending on quantity
Payment Terms: T/T
Supply Ability: 100000 Tons per year
Delivery Time: 2-10weeks
Packaging Details: Plywood cases or pallets
Standard: ASTM
Grade: A106
Packing: Plywood cases or pallets
Size: OD 3 Inch, SCH 40, 6 Meters
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    OD 3inch SCH40 6m Stainless Steel Seamless Pipe ASTM A106 Grade B Pipe Galvanized

    ASTM A106 Gr.B Galvanized Pipe, OD 3 Inch, SCH 40, 6 Meters, BE Ends.

    Stainless steel seamless steel pipe is a kind of long strip steel with hollow section and no joint around it. Is resistant to air, steam, water and other weak corrosion media and acid, alkali, salt and other chemical corrosion medium corrosion steel pipe. Also known as stainless acid-resistant steel pipe.

    Characteristics
    First, the thicker the wall thickness of the product, the more economical and practical, the thinner the wall thickness, its processing cost will increase greatly; secondly, the process of the product determines its limited performance, generally seamless steel pipe accuracy is low: uneven wall thickness, low brightness inside and outside the tube, high sizing cost, and inside and outside the surface also pockmarks, black spots are not easy to remove; third, its detection and shaping must be offline treatment. Therefore, it shows its superiority in high pressure, high strength and mechanical structure.
    Stainless steel seamless pipe is resistant to air, steam, water and other weak corrosion medium and acid, alkali, salt and other chemical corrosion medium corrosion steel pipe. Also known as stainless acid-resistant steel pipe.
    The corrosion resistance of stainless steel seamless tubes depends on the alloying elements contained in the steel. Chromium is the basic element to obtain corrosion resistance of stainless steel. When the chromium content in steel reaches about 12%, chromium acts with oxygen in corrosive medium and forms a thin oxide film (self-passivation film) on the steel surface, which can prevent the steel matrix from further corrosion. In addition to chromium, nickel, molybdenum, titanium, niobium, copper and nitrogen are commonly used in stainless steel seamless pipes to meet the requirements of stainless steel structure and properties for various uses.
    Stainless steel seamless pipe is a hollow long circular steel, widely used in petroleum, chemical, medical, food, light industry, mechanical instruments and other industrial transport pipelines and mechanical structure components. In addition, when bending and torsion strength is the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. Also often used for the production of a variety of conventional weapons, barrel, shells and so on.

    Category
    The rolling method is divided into hot rolling, hot extrusion and cold drawing stainless steel pipe.
    According to the metallographic structure of stainless steel, it is divided into semi-ferrite semi-m martensite stainless steel pipe, martensite stainless steel pipe, austenitic iron stainless steel pipe and so on.
    Specification quality
    A, GB14975-94< Stainless Steel Seamless Steel Pipe) The length of hot rolled steel pipe is 1.5~10 m, hot extruded steel pipe equal to and greater than 1 The wall thickness of cold-drawn (rolled) steel pipe is 0.5~1.0 mm ,1.0~7, and 1.5~8 m. if the wall thickness is greater than 1.0

    B, diameter of hot rolled (hot extruded) steel pipe is 54~480 mm and the wall thickness is 4.5~45. The diameter of cold-drawn (rolled) steel pipe is 6~200 mm and the wall thickness is 0.5~21.
    C, there shall be no cracks, folding, cracking, cracks, rolling, delamination and scarring defects on the inner and outer surfaces of the steel pipe, these defects shall be completely removed (except for pipes for machining) and the wall thickness and outer diameter shall not exceed the negative deviation after removal. Any other minor surface defects not exceeding the allowable negative deviation may not be removed.
    D, straight path allows depth. hot-rolled, hot-extruded steel tubes of not more than 5% of nominal wall thickness with diameters less than and equal to 140 mm, maximum depth not greater than 0.5 mm; cold-drawn (rolled) steel tubes not greater than 4% of nominal wall thickness, maximum depth not greater than 0.3 mm.
    E, both ends of the steel pipe should be cut into right angles and burr removed. Manufacturing process of stainless steel seamless pipe:
    1. hot rolling (extruded seamless steel pipe): tube billet → heating → perforation → three-roll oblique rolling, continuous rolling or extrusion → pipe removal (or reduction), cooling, straightening → water pressure test (or flaw detection) and storage
    The raw material of rolling seamless pipe is round tube billet. The round tube embryo is cut by cutting machine to process the billet with a growth degree of about 1 meter and sent to the furnace by conveyor belt for heating. The billet is heated into the furnace at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key problem. After the round tube billet is out of the oven, it must pass through the pressure perforation machine to carry on the empty. The common perforator is conical roller perforator, which has high production efficiency, good product quality, large perforation diameter expansion and can wear many kinds of steel. After perforation, the round tube billet has been three-roll oblique rolling, continuous rolling or extrusion. After extrusion, take off the pipe and set the diameter. The diameter fixing machine rotates into the steel embryo through the conical bit at high speed to form the steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the drill bit. After the steel pipe is fixed, it enters the cooling tower and is cooled by water spray. After cooling, the steel pipe will be straightened. The steel pipe is straightened and sent from conveyor belt to metal flaw detector (or hydraulic test) for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, it will be detected. Steel pipe quality inspection but also through strict manual selection. After quality inspection of steel pipe, spray the number, specification, production batch number and so on with paint. And crane into the warehouse.
    2. cold drawn (rolled) seamless steel pipe: pipe billet → heating → perforation → head → annealing, pickling → oiling (copper plating), multi-pass cold drawing (cold rolling)→ billet tube heat treatment, straightening → water pressure test (flaw detection) marking → storage.
    The rolling method of cold drawn seamless steel pipe is more complicated than that of hot rolled seamless steel pipe. Their production process is basically the same in the first three steps. The difference starts from the fourth step, after the tube blank is empty, to hit the head, annealing. After annealing, special acid liquid should be used for pickling. After pickling, oil. Then followed by a multi-pass cold drawing (cold rolling) billet tube, special heat treatment. After heat treatment, the same treatment as steel pipe cooling process.

    Applications
    the stainless steel pipe is safe and reliable, sanitary and environmentally friendly, economical and applicable, the thin-walled pipe and the successful development of a new reliable, simple and convenient connection method make it have more and more irreplaceable advantages of other pipes, and the application in engineering will be more and more popular, and the prospect is promising.
    With the implementation of the policy of reform and opening up in China, the national economy has gained rapid growth, and urban housing, public buildings and tourism facilities have been built in large quantities, which has put forward new requirements for the supply of hot water and domestic water. Especially the water quality problem, people pay more and more attention, the request also unceasingly enhances. Due to its corrosiveness, galvanized steel pipe will gradually withdraw from the historical stage under the influence of relevant national policies. Plastic pipe, composite pipe and copper pipe have become the common pipes in pipeline system. Nevertheless, in many cases, stainless steel pipe has more advantages, especially thin-walled stainless steel pipe with a wall thickness of only 0.6~1.2 mm in high quality drinking water system, hot water system and water supply system that puts safety and hygiene first. It has the characteristics of safety and reliability, sanitation and environmental protection, economic application and so on. It has been proved by engineering practice at home and abroad that it is one of the best comprehensive performance, new type, energy saving and environmental protection pipes of water supply system, and it is also a very competitive water supply pipe, which will play an unparalleled role in improving water quality and improving people's living standard.
    In the building water supply pipe system, because the galvanized steel pipe has finished a hundred years of glorious history, various new plastic pipes and composite pipes have developed rapidly, but there are still some shortcomings in various pipes. It is far from fully adapted to the needs of water supply pipe system and national requirements for drinking water and related water quality. Therefore, experts predict: building water supply pipes will eventually return to the era of metal pipes. According to foreign application experience, thin-walled stainless steel pipe is considered as one of the best comprehensive pipes in metal pipe.

    (1) The time is ripe for the popularization and application of thin-walled stainless steel tubes in China
    Thin-walled stainless steel pipe, which began to be produced and used in China in the late 1990s, is a new generation in the field of pipe materials, and has been widely used in the pipeline of building water supply and direct drinking water.
    The thin-walled stainless steel pipe is durable and has been recognized by engineering circles, and the relevant parties are starting from reducing the wall thickness and reducing the price to facilitate further promotion. Especially small diameter stainless steel pipe, the price is not high, so the matching connection method, pipe fittings reliability and price are the main factors that determine its development. Domestic developers in Sichuan, Guangdong, Zhejiang, Jiangsu and other places have independently developed the connection technology and pipe fittings, is a very promising pipe. According to document No .71 of China Technology Market Management Promotion Center and Guoke City Word [2001], the Ministry of Construction and relevant departments have also attached great importance to this new type of pipe. According to the circular on the promotion and application of "medium and high pressure water supply pipes with high diameter wall ratio and high precision stainless steel and supporting pipe fittings and special technology ", thin-walled stainless steel pipe is of great significance to improving the grade of modern buildings in China and improving and ensuring the water quality.
    At the same time, the Ministry of Construction attaches great importance to the promotion and application of thin-walled stainless steel pipes. The industry standard for thin-walled stainless steel pipes was issued in 2001. Related pipeline engineering technical regulations and installation atlas, the Ministry of Construction has issued a document, is being compiled by Tongji University. Sichuan, Guangdong, Zhejiang, Jiangsu and other places have professional manufacturers to produce thin-walled stainless steel pipe, the product has become mature, therefore, the time to promote the application has come.
    (2) Good prospects in the domestic market
    1. Large demand for building water supply lines
    The annual demand for pipes between 2001~2010 is estimated to be 50 million 600 thousand ~ according to the Ninth Five-Year Plan of Construction and the Outline of the Vision 2010 km, of which the demand for hot and cold water pipes in residential building areas is 400 thousand km. Some people believe that the development of stainless steel pipes, to improve the grade of modern urban buildings, of great significance.

    2 Direct drinking water pipeline is developing rapidly
    With the development of national economy, pipeline direct drinking water has developed rapidly in Beijing, Shenzhen, Shanghai, Chongqing and other cities in China. In direct drinking water, stainless steel pipe system is undoubtedly second to none. Domestic hotels, public places have been configured or in the allocation of direct drinking water pipes.
    3. The future of alternative imports from home is broad
    In order to popularize stainless steel pipe, our country has solved the technical problem of "high diameter wall ratio and high precision" thin wall stainless steel pipe from the aspect of reducing wall thickness and reducing cost since 1990s, so that stainless steel pipe can be popularized and applied quickly. A kind of pipeline should be able to popularize and apply in an all-round way, without localization. Some domestic manufacturers have the ability to produce and further develop thin-walled stainless steel pipes and fittings.
    (3) The stainless steel pipe is connected in various ways
    The common types of pipe fittings are compression type, compression type, live connection type, propulsion type, push thread type, socket welding type, live connection type flange connection, welding type and the derivative series connection mode of welding and traditional connection. These connections vary according to their principles and their scope of application, but most of them are easy to install, solid and reliable. The sealing ring or gasket material used in the connection, most of which meet the requirements of the national standards of silicone rubber, nitrile rubber and EPDM, etc., to avoid the worries of users.


    折叠dimensional discrepancy

    Deviation levelAllowable deviation of standardized outer diameter
    D1±1.5%,

    minimum

    ±0.75 mm
    D2±1.0%.

    minimum

    ±0.50 mm
    D3±0.75%.

    minimum

    ±0.30 mm
    D4±0.50%.

    minimum

    ±0.10 mm


    折叠

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